package NodeList;

import java.util.List;

/**
 * @ Author     ：侯耀祖
 * @ Description：
 */
public class ListNode {
    public int val;
    public ListNode next;
    public ListNode prev;
    public ListNode() {}
    public ListNode(int val) { this.val = val; }
    public ListNode(int val, ListNode next) { this.val = val; this.next = next; }
    public ListNode(int val, ListNode next, ListNode prev) { this.val = val; this.next = next; this.prev = prev;}
}
